Forgot to call his attention to the column regarding the Julian period in the Nautical Almanac. Something strange about the neighborhood of R. Leporis. He has no doubt seen the table of Julian dates in the Connaissance des temps.
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The Sir John Herschel Collection
The preparation of the print Calendar of the Correspondence of Sir John Herschel (Michael J. Crowe ed., David R. Dyck and James J. Kevin assoc. eds, Cambridge, England: Cambridge Univ. Press, 1998, viii + 828 pp) which was funded by the National Science Foundation, took ten years. It was accomplished by a team of seventeen professors, visiting scholars, graduate students, advanced undergraduates, and staff working at the University of Notre Dame.
The first online version of Calendar was created in 2009 by Dr Marvin Bolt and Steven Lucy, working at the Webster Institute of the Adler Planetarium, and it is that data that has now been reformatted for incorporation into Ɛpsilon.
Further information about Herschel, his correspondence, and the editorial method is available online here: http://historydb.adlerplanetarium.org/herschel/?p=intro
No texts of Herschel’s letters are currently available through Ɛpsilon.
Forgot to call his attention to the column regarding the Julian period in the Nautical Almanac. Something strange about the neighborhood of R. Leporis. He has no doubt seen the table of Julian dates in the Connaissance des temps.
Sends calculation of the Transits of Venus in 2004 and 2012. Cannot find any record of new double stars. Is in doubt about R. Leporis. Quotes an historical incident regarding an eclipse of the sun and the removal of Mahomet's pulpit. Did F. X. von Zach make his calculations himself?
Is anxious to have an astronomical eye-piece based on JH's principles. Encloses communication from Messrs. Horne and Thornthwaite, who would like details for their employee, [W.?] Ackland, to work from.
Is at present too ill to involve himself in any calculations necessary for making a good optical eyepiece.
Is grateful for his reply. Hopes he is feeling better. Escaped worst of the winter by expedition to Algeria, though the results were disappointing. Comments on some of his observations. Feels sure [W.?] Ackland will be able to construct a suitable eyepiece.
Thanks WH for informing JH of his son John being selected as a Council nominee for election to F.R.S.
Queries regarding the red glow seen during an eclipse of the sun.
Would like his views on the correct definition of a billion, to settle an argument.
Thanks for his Easter offering. Sends a little book which he may find useful.
Sending a long letter proving one of JH's theories regarding the sun and confirmation of one of William Herschel's observations concerning Saturn.
Thanks for JH's remarks on his own 'What is matter'; comments on these. Also regarding JH's theory of the sun's repulsive force and William Herschel's observations on the strange shape of Saturn.
Outlining his work at the Royal Observatory since 1839 and requesting an addition to his income.
His colleague, [G. R.] Waterhouse, has passed an inquiry from JH to NM regarding a mineralogical character. It is a specimen of Obsidian, very high in iron content.
Is gratified and encouraged by JH's approval of JN's illustrations of the lunar surface. The improvement in printing processes makes it possible to use such photographic illustrations.
Many thanks for his comprehensive explanations for the use of that word. Regrets JH's tenant at Slough is so unpunctual. Has JH any plan or map of his property at Slough and Upton?
Needs address of [H. J. R.] Petersen of Kiel, to whom JH must send grant of £50 from B.A.A.S. for reduction of Gaussian constant. Gives address of G. A. Erman. JH's poor health.
Thanks WS for volunteering to forward B.A.A.S. grant to G. A. Erman while JH is ill.
Please clarify FW's request for testimonial from JH to assist FW in obtaining better appointment. JH does not know FW's capabilities and can testify only to good character of FW's family.
Opposes bill on decimalization of [British] weights and measures.
JH's 25 Apr. 1871 reply encouraged JB to oppose introduction of French metric system. [Thomas] Brassey and Mr. Shuttleworth will vote against it [in House of Commons].